Sewing-machine.



F. J. NASH.

SEWING MACHINE;

APPLIOATION FILED JUNE 16, 1906.

Patentd Feb. 17, 1914.

4 SHEETS-SHEET 1.

F. J. NASH.

, SEWING MACHINE. APPLICATION FILED JUNE 16, 1906.

Patented Feb. 17, 1914.

4 SHEETS-SHEET 3.

fiiiifb I P. J'. NASH.

SEWING MACHINE. APPLICATION FILED JUNE 16, 1906.

,087,602. Patented Feb. 17,1914.

4 SHEETS-BHEBT 4. .31.-

UNITED STATES PATENT onnron.

FREDERICKU. NASH, OF SOMERVILLE, MASSACHUSETTS, ASSIG'NOR '10 UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEVI JERSEY, A CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

SEWING-MACHINE.

Patented Feb. 17, 1914.

Application filed June 16, 1906. s riamo. 321,958.

To all ivhom it may concern Be it known that I, FREDERICK J. NASH,

a citizen of the United States, residing at- Somerville, in the county of Middlesex and State of Massachusetts, have invented cerments in sewing machines which are particularly adapted for use in the manufacture of shoes or other articles of leather. In sewing machines of this-class, the work to be operated upon is held against the work support by a presser foot or, analogous movable 'work compressing member, and the work is intermittently compressed between the work support and the presser foot and released by the action of the presser foot which-is automatically acted upon by suitable mechanism during each cycle of operations of the inachine. At the endof the sewing operation when the finished work is to beremoved and new work is to be inserted, it is necessary to raise the presser foot from the work to release it. In machines of this class 'asheretofore constructed, the raising of the presser foot to permit the removal and insertion of work has been performed by the operator as a manual operation after the machine has been stopped, and it has been found in practice that this i'qnanual operation of raising the presser foot increases sensibly the labor and decreases the speed of the operation of the machine.

The object of the present invention is to relieve the operator of this class of machines from the necessity of manually raising the presser foot, and the invention consists therefore in a sewing machine. of this class in I es which the power of the machme is used to raise the presser foot Fat'f the completion of the sewing operation and hold "the presser foot raised to permit the removal and insertion of work, the mechanismfor accomplish.-

ing this result being inactive during "the normal-foperation' of the. machine in sewing a seam and arranged so as to interfere in no way-with the automatic mechanism which acts on thepresser foot during. each cycle of operations while the machine is running.

Other objects and features of "the invention will be apparent from the following descrlptlon of the preferred embodiment of the invention.

In the drawings Figure 1 is a side eleva tion of the upper portion of a shoe-sewing machine in which the present invention is 'embodied. Fig. 2 is a rear elevation of a portion of the'machine including the present invention, Fig. 3 is a plan view showing the base plate of the machine and portions of the devices for lifting the presser foot to permit the removal and insertion of work, and Fig. L is a side elevation of the stoppingand-starting mechanism. The invention is illustrated as embodied in a shoe-sewing machine of the well-known McKa type, such as is disclosed 'in the patent to cKay and Mathies, No. 36,163, dated The machine is provided with the usual cam shaft 1 carrying the cams by which the' instrumentalities of the sewing machine are operated, and with-a presser foot 2 secured toa -shank 3i and actuated and controlled by the usual mechanism comprising the cam actuated presser foot lifting lever 73, the

- ratchet toothed nut 74 having a screwthreaded engagement with the shank 3 and the locking pawl 75. As is fully described in the patents above referred to, the presser and nut 74, and is raised by the lever 73 and allowed to fall during each cycle of operations of the machine. The machi e is alsoprovided with a rotatable work rest or horn 4 of ordinary form.

' Inthe illustrated embodiment of the infoot is locked and unlocked by the pawl 75 ventionTthe mechanism for lifting the presser foot at'the completion of the sewing operation to; permit the removal 'andinsertion 015' work is combined with a stopping-andthe needle raiise d' fromthe work, and -although I this" Ls'itopping-and-starting mecha:

.nism inpandxdfitself does not form a part oflthe'. resent invention, it is described herein 'to'fa 0rd a'clear understanding of the operation of ,presserfoot-lifting mechastarting mechanism adapted to stop the ma- I chine always at 'a certain point, that is, with nism. The cam shaft 1 is provided with a disk-shaped clutch member 5 fixed thereto, and a grooved driving pulley 6, which is constantly rotated by a belt connected with any suitable source of power, is loosely mounted on the cam shaft 1 so as to rotate freely thereon when the machine is not running. The pulley 6 is provided with a clutch surface adjacent to the clutch member 5., and means" are provided for pressing the pulley against the clutch member so as to cause it to rotate the cam shaft. The clutch-operating means comprise a sleeve 7 rotatably mounted on the cam shaft and provided with an inclined surface 8 engaging a corresponding inclined surface 9, formed on the journal member 10 of theframe of the machine in which the cam shaft 1 is journaled. The sleeve 7 is provided with an arm 11 connected by a link 12 with a rod '13 slidingly mounted a bearing 14 on the frame of the machine. The rod 13 is pivotally connected at 15, as shown in Fig. 1, with a rod 16 connecting it with a treadle .(notshown). When the treadle is depressed by the operator the rods 16 and 13 are drawn down, and,

through the'medium of the link 12 and the arm 11, the sleeve 7 is rotated so that the inclined surfaces 8 and 9 cause the sleeve to be moved longitudinallyon the cam shaft. A ball thrust bearing 17 is interposed be tween the sleeve 7 and the pulley 6, and by these means the pulley is pressed and held against the clutch member 5, and the machine is thrown into and maintained in operation while a shoe is being sewed.

The mechanism for stopping the machineat a certain point in its cycle of operation comprises a brake and a spring buffer for bringing the cam shaft and cams to rest, and automatic mechanism for throwing the brake andbuifer into operation at a certain point in the cycle of operation of the machine after the driving clutch members have been released by .=the operator to stop the machine. The clutch member 5 is provided with a brake drum 18, and a brake block "I9 arranged to cooperate therewith is fixed to a slide 20 mounted in a slide guide 21 fixed to the frame of the machine. A spring 22 located .in a thimble 23 on the frame of the machine tends normally to press the brake upward against the brake drum, butwhile the machine is in operation the slide 20 is held down by a latch 24 ivoted to the slide guide 21 and held norma ly in engage- Inent with a notch 25 by means of a spring- 26' engaging the tail of the latch. A trip lever 27 is pivoted at 28 upon a universal joint which permits the trip lever to swin about a pivot 29 toward and from the late 24 to engage andrelease the same, and the universal joint also permits the trip lever to swing laterally so. that its upper end 30, which is normally in the right hand position, as shown in Fig. 2, may swing to the left toward the clutch disk 5 so as to come within the path of mot-ion of a roll 31 carried by the clutch disk and operating to swing the trip lever in a vertical plane as above described to trip the latch 24, the tri lever having a projecting shoulder 32 whic is in position to engage, at such time, the tail of the latch, as shown in Fig. 4. The trip level; is held, during the normal operation of the machine, out of engagement with the trip roll 31 by means of a detent 33 pivoted upon the frame of the machin and held, by a spring 35, in engagement with the lower end of the trip lever The sliding rod 13 above mentioned (seeF i 2) carries'at its lower end a spring-presse bypass 36 which moves freely past the tail 37 of the detent 33 when the rod 13 is drawn whereby the upper end 30 of the trip leveris brought into the path of movement of the trip roll. 31. As soon as the rotation of the cam shaft, which is in the direction of the arrow in Fig. 4, brings the roll into contact with the trip lever, the" latter is swung in a vertical plane so as to trip the latch 24 andrelease the brake slide 20, as above described, and the brake is immediately pressed against the brake drum by the spring 22, thereby retarding the rotation of the machine. The machine is brought finally to rest at the proper point by means of a stop pin 39 fixed to the clutch disk '5 in position to engage and be arrested by a spring bufier 40, which is slidingly mounted in the upper end of the brake slide -20 and is supported by a s ring 41, so as to arrest the stop pin 39 wit out jar. As the ,sition of the stop. pin 39 is fixed, the mac inewill always be arrested at precisely the right int, with theneedle out of the work, and. e trip roll 31 is so located that it releases the brake lo enough before the stop pin engages the bu fer to bring the machine almost to rest b0- forelthis foccurs and prevent a violent con cussion o the stop pin against the bufier. The position of the trip roll may be adjusted 42 provided for this u'rpose in the clutch disk 5. The brake side carries a bracket ,58 provided with a pin 59 which on the curved side of the trip lever, as s qwn in Fig. 2, and resets this lever when the -brake slide risen rod 54. The rod 54 is pivotally connected extending through a slot in the side The resser-foot lifting-mechanism forming particularly the subjectmatter oft-his application is so combined with the stopping mechanism above described as to operate automatically when the stopping mechanism is thrown into operation by the release of the treadle, whereby the machine is brought to rest with the presser foot raised from the work so that no further 0peration on the part of the operator is necessary to permit the removal of the work from the horn. The power by which the presser foot is so raised is derived from the cam shaft 1, the momentum of the cams and cam shaft, after the clutch is disconnected, being utilized for this purpose so that the presser-foot lifting mechanism assists the stop mechanism in bringing the machine to rest. A cam 43 (see Figs. 1 and 2) is mounted upon the cam shaft 1 and a cam leven44 pivoted at 45 upon the frame of the machine, carries a cam roll 46 adapted to engage the cam 43. The rear end of the cam lever 44 is connected by means of a link 47 with an arm 48 (see Fig. 3) fixed to a rock shaft 49 which is journaled in ears on the lower side of the base plate '50 of the machine. The rock shaft 49 carries at its other end anarm -51 fixed thereto and pivotally connected with a link 52 which has a slotted lower end engaged by a pin 53 fixed to a at its upper end (as shown in Figs. 1 and 2) withthe brake slide 20, being pivoted upon a pin 55 fixed in the brake slide andguide.

(See Fig. 1). The rod 54 is'connected at its lower end with a treadle (not shown).

A spring 56connected at its lower end to a downwardly-projecting extension 57 on the arm 48 and adjustably connected at its upper end to the frame of the machine tends to draw up the arm 48.and the cam lever 44 so as to cause the cam roll to engage the cam, but during .the operation of the -machine these parts are held down by the arm 51 and the connections with the brake slide, the brake slidebeilig depressed, as above described, so that the pin 53 (Fig. 2) engages the bottom 'of the slot in the link 52, and the cam roll is thus. held normally out of contact with the cam.

. A lever 60 is pivotally mounted upon the shaft 49,-being' prevented from longitudinal movement by a collarfil, and the" forward end of the lever is pivotally'connected with ta rbd 62' carrying at its upper end 2. lug 63 adapted *to engage a collar 64 fixed to the presser bar 3. The .rod 62 and lug 63 are normally' in lowered position so as not to interfere with the operation ofthe presser foot, the rear end of the lever being at such time in raised position, dotted lines Fig. 1. The rear end of the. lever-'60 is provided with a hole located in and the resser-foot is then as shown in ,of time after the treadle is released to the locking pin 65 does not engage the hole in the lever 60; but when the presser-footraising mechanism is thrown into opera;

tion as above described by the release of the starting treadle, and the arm 48 rises, the locking pin is pressed into thehole by the spring 66. The cam roll 46 at this time engages the depression in the cam 43, and when the continued rotation of the cam causes the cam lever 44' and the arm 48 to be depressed the locking pin 65 carries the rear end of the lever 60 downwardly, thereby raising the forward end of the lever 60 and the rod 62 and lug 63, and the lug, by engagement with the collar 64, raises the presser foot from the work.

After the completed work has been removed from the machine and another shoe has been placed upon the horn, it is desirable to release the presser foot to permit it to engage the work before the operation of the machine is reestablished by pressing upon the treadle,:md for this'purpose manually. -operated means are provided for releasing the presser foot from the lifting mechanism. 'A sliding mounted in 3) has on its rear end ardepending arm 68' pivotally connected with a wedge-shaped block 69 which embraces the stem of' the locking pin 65 and engages an inclined washer '70 mounted thereon; .The rod 67 is normally held in forward position by a spring 71, but when it vis pushed back by the operator pressing against its'forward end, the wedge 69 draws the locking pin 65 the frame of the maehinetsee Figs. 1 and? into the recess in the arm 48, so as to dis- Y engage it from the hole in the lever 60, pressed down against the work by its spring 72.

To permitthe machine to be turned by hand after it has been stopped by the stopping mechanism the treadle connected with v I the rod 54 is depressed, and the brake slideisthereby drawn down so as .to disengage the brake and the buffer. To start the machine again it is then necessary press upon the other treadle, thereby connecting the clutch. Both treadles may be depressed at once if desired, so as to throw the machine into operation by a single motion on the part ofthe operator.

With the mechanism above described the operator is entirely relieved from the labor and loss. of time involved in raising the only to presser-foot, and the work may be removed from the machine without sensible interval stop mechanism for raising the presser-foot is particularly useful in connection with stopping mechanism adapted to stop the machine at a certain point, itis not restricted to such use, nor is it intended to so limit the claims, except where expressly so limited, since it is new, so far as the inventor is informed, to provide a sewing machine having a presser footi which is automatically actuated during each cycle of operations of the machine with power-actuated mechanism for raising the presserfoot or analogous Work-engaging member when the machine is stopped and for holding the presser foot raised to permit the removal and insertion of work.

The invention is not'limited to use in connection with any particular form of sewing machine, nor, in general, to the details of construction and operation of its illustrated embodiment, but may be employed in other connections and embodied in other forms broadly defined by the claims.

Having now described the invention, what.

, chine is stopped. 40'

2. A shoe sewing machine having, in com bination, stitch forming devices including a needle, a driving shaft and suitable connections between said shaft and the stitch forming devices, a presser foot, means operating automatically to raise the presser foot at a certain point in each cycle of operations ofthestitch forming devices, means under the control of the operator for stopping the driving shaft at another point in the cycle of operations with the needle raised from the work, and mechanism nor- 1 mally inoperative during the sewing of the seam operating automatically during the forward rotation of the driving shaft to lift the presser foot as the machine is stopped.

3. A shoe sewing machine having, in combination, stitch forming devices including a 'needle,'a driving shaft and suitable connections. between said shaft and the stitch forming devices, a presser foot,- mechanism operating automatically during eachcycle of operations of the stitch forming devices to actuate the presser foot to compress .and

relieve the work, means under the control of bination, stitch forming shaft and suitable connec-' tions between said shaft and the stitch formthe operator forjstopping the driving shaft with the needleyraised from thework, and mechanism normally inoperative during the sewing of the'seam operating automatically to lift the presser foot as the machine is stopped.

4. A shoe sewing machine having in comdevices including a needle, a drivin ing devices, a presser foot, mechanism operating automatically during each cycle of operations of the stitch forming devices to actuate the presser foot to compress and relieve the work, means under the control of the operator for stopping the driving shaft with the needle raised from the work, and mechanism normally inoperative during the sewing of the seam operating automatically during the forward rotation of the driving shaft. to lift thepresser foot as the machine is stopped.

5.. A-shoe sewing machine having, in combination, stitch forming devices including a needle, a drivin shaft and suitable connections between said shaft and the stitch forming devices, a presser foot, means operating automatically to lock and unlock thepresser foot' during each cycle of operations, of the.

stitch forming devices, means under the control of the operator for stopping the driving shaft with the needle raised from the work, and mechanism normally inoperativeduring the sewin of the seam operating automatically to' lift the presser foot as the machine is stopped. H

6. A shoe sewing machine having, in combination, stitch forming devices including a needle, a driving shaft and suitable connections between said shaft and the stitch forming devices, a resser foot lneans' operating automatica y to lock and unlock the" presser foot during each cycle of operations" of the stitch forming devices, means under the control of the operator for stopping the driving shaft with the needle raised from the work, and mechanism normally inoperative during the sewing of the seam operating automatically during the forward rotation of the driving shaft to lift the presser foot as the machine is stopped.

7. A shoe sewing machine having, in coming a presser foot, :1. driving shaft, driving mechanism therefd'r, a cam driven by the bination, sewing instrumentalities 'includshaft, connections between the cam and the presser foot normally out of operative relation with the cam during the sewing of the seam, and means under the control of the operator for disconnecting the driving mechanism and movin said. connections into operative relation with the cam to raise the presser foot by the operation of the cam as the driving shaft is stopped.

8. A shoe sewing machine having, in combination, sewing instrumentalities including a presser foot, a driving shaft, driying mechanism therefor, a cam driven by the shaft, connections between the cam and the presser foot normally out of operative relation with the cam during the sewing of the seam, means under the control of the operator for disconnecting the driving mechanism and moving said connections into operative relation with the cam to raise the presse'r foot by the operation of the cam as the driving shaft is stopped, and means under the control of the operator for moving said connections out of operative relation with thecam to lower the presser foot on the work while the cam remains stationary.

' 9. A shoe sewing machine having, in combination, stitchforming devices, a driving shaft and suitable connections between said shaft and the stitch 1'" rming devices, driving mechanism for saf shaft, a presser foot, presser foot lifting mechanism normally inoperative, during the sewing of a seam, means under the control of the operator for disconnecting said shaft from its driving mechanism and rendering the presser foot lifting mechanism operative to raise the presser foot asthe shaft is stopped, and means under the control of the operator for actuating the presser foot lifting'mechanism to lower the resser foot while maintaining the driving shaft stationary and disconnected from its driving mechanism.

10. A shoe sewing machine having, in con1bination, stitch forming devices including a needle, :1 presser foot, a drivingshaft, means for controlling the rotation of the driving shaft and stopping said shaft with the needle raised from' the work, and mechanism normally inactive during the sewing of the seam arranged to be actuated by said shaft to automatically raise the presser foot as the shaft is stopped with the needle raised from the work.-

11. A shoe sewing machine having, in combination, stitch forming devices, a presser foot, a driving shaft, connections between the driving shaft and the presser foot for raising the-presser foot, said connections being inoperative during the normal operation of the machine, and means under the control of the operator for lowering the presse'r foot on the work without throwing the shaft into operation.

12. A shoe sewing machine having, in combination, stitch forming devices including a needle, a presser foot, a driving shaft, connections between the driving shaft and the presser foot inoperative during the normal operation of the machine and acting when actuated by the driving shaft to raise the work. 7 i

In testimony whereof Iaffix my slgnature, in presence of two witnesses FREDERICK J. NASH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. 0.

the presser foot While the needle is out of 

